US3950189A - Method for cutting out a work piece by a plasma jet or similar cutting arrangement - Google Patents

Method for cutting out a work piece by a plasma jet or similar cutting arrangement Download PDF

Info

Publication number
US3950189A
US3950189A US05/502,763 US50276374A US3950189A US 3950189 A US3950189 A US 3950189A US 50276374 A US50276374 A US 50276374A US 3950189 A US3950189 A US 3950189A
Authority
US
United States
Prior art keywords
cutting
axis
symmetry
cutting devices
work piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/502,763
Other languages
English (en)
Inventor
Gerhardt Lange
Hans Hirschberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Application granted granted Critical
Publication of US3950189A publication Critical patent/US3950189A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6584—Cut made parallel to direction of and during work movement
    • Y10T83/6592—Interrelated work-conveying and tool-moving means
    • Y10T83/6595—With means to move tool laterally of feed direction during cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/808—Two tool pairs, driver for one pair moves relative to driver for other pair
    • Y10T83/817—With variable spacing between tool pairs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/808—Two tool pairs, driver for one pair moves relative to driver for other pair
    • Y10T83/817—With variable spacing between tool pairs
    • Y10T83/819—With intermediate work support

Definitions

  • the present inventon relates to a method for cutting out a work piece especially with the help of torch or plasma cutting apparatus and/or drawing the pattern of a work piece, in both instances on a metal plate, wherein the work piece is constructed with an outline which symmetrically lies on both sides of an axis of symmetry.
  • an object of the present invention to provide a method of cutting out work pieces of the above type from a metal plate with the help of which the productivity of a dual-axle cutting machine is substantially increased and on the other hand which insures that the work pieces can be produced warp or buckle free due to heating.
  • a single control arrangement which delivers control signals according to a desired shape of the work piece to the drive of a carrier and to at least one of the several torches found on the carrier in a displaceable fashion and wherein the carrier is displaced in the direction of the axis of symmetry (y direction) and the burner or torch is displaced transverse to the axis of symmetry and wherein the movements of the burners always equal but opposite in their direction (-x compared to +x directions).
  • a work piece which is symmetrically shaped is simultaneously being cut out with two cutting torches or burners.
  • the operating efficiency of the cutting machine (a dual-axle machine) is nearly doubled.
  • the burners engage a work piece at congruent points on the left and right side of the axis of symmetry of the work piece and will therefore deliver on both sides of the work piece, equal heat quantities into the work piece thereby practically eliminate warping due to the heating effect.
  • work pieces having mirror image shape about their axis of symmetry are cut out. It is within the scope of the present invention that work pieces, having a similar form falling on both sides of an axis of symmetry, such as the mirror images of circles or rectangles, can be cut.
  • the invention is also employed advantageously in that pattern of a work piece or its outline can be drawn on a work piece on both sides of the axis of symmetry by employing a punch marker or a color spray pistol. All that is necessary is that on the burner carrier carrying the torches, a pattern drawing device, such as a punch marker or a color spray pistol, be provided. Such pattern drawing device can be moved into operating position by the control signals by being pivoted into position or by a device which is the subject of German Application No. 2236156.
  • both burner axles are tilted with respect to each other in such a fashion that the cutting jets (the oxygen or plasma jets) cut each other in a common point which lies in the region of a point of intersection of the outline of the work piece with the axle of symmetry of the work piece, and wherein the outline and the axis of symmetry are at a right angle. It is, however, necessary that after the performed cutting operation the burners must be again brought into their vertical position in order that a cutting of a work piece outline which lies parallel to the axis of symmetry could be cut with cutting edges which lie perpendicular with respect to the upper surface of the work piece.
  • the second torch or burner becomes coupled with the first burner or torch by means of a device causing the reversing of the transverse movement of the first burner and that the distance between the center axes of the two burners corresponds to the total length of the cut. Subsequently the first burner or torch through signals of the control arrangement and the second burner or torch through the return mechanism are moved in a mirror-image fashion until they reach the region of a second contour line cutting the axis of symmetry at a rectangle.
  • a reversing device which for example, in a dual-axle machine employs an endless steel belt driven by appropriate control signals from the general control arrangement and in which the first torch or burner is clamped to one side of the belt and after the completion of the starting cut the second burner becomes clamped to the other side of the belt to thereby attain movement of the burners directed opposite but along the same axis.
  • a very simple reversing arrangement is obtained without making changes in the structure of the cutting apparatus itself. It is within the scope of the invention to cover also other reversing arrangements, such as, mechanical, electrical type of arrangements or which employ magnetic devices.
  • the second burner before the clamping will engage a boss provided on the first burner or torch and which boss corresponds to a certain dimension provided by the control arrangement.
  • both burners or torches come to a second contour line of the work piece which cuts the axis of symmetry at a rectangle.
  • the burners according to the present invention are moved along such contour lines toward each other.
  • the invention proposes that shortly before the burners engage each other the coupling between the two burners becomes released and the remaining portion of the outline will be cut through only by one of the burners.
  • FIG. 1 is a schematic illustration of a dual axis torch cutting machine showing also the work piece to be cut out;
  • FIG. 2 is another work piece having a different shape.
  • the two-axle torch cutting apparatus includes substantially a control arrangement 10 (which can be of the photoelectric scanning type, or numerical controls or similar control arrangement such as employed in U.S. Pat. No. 3,502,881), which delivers control signals corresponding to the work piece shape under cutting.
  • the control signals can be readily stored in a numerical device or obtained by scanning a drawing of the work piece pattern.
  • a carrier carriage 13 is moved in the direction of the arrow 11 (representing the y direction in a rectangular coordinate system and a steel belt 26 will move in the direction of the double arrow 30a, 30b representing the plus x and minus x directions limit.
  • a pair of cutting torches 14 and 15 mounted which can be of the autogenous plasma-type, laser or cutting knife type, and can be also a pair of marking devices such as punch markers or paint spray pistols, mounted if needed for some type of work.
  • a work piece 31 is being cut out from a plate 16.
  • the work piece 31 is illustrated as having a similar contour or outline on both sides of the axis of symmetry thereof and will have circular cut out portions 32, 33, triangular cut outs 34 and holes 35, 36 rectangular cutouts 37, to be made thereon.
  • the punching marks to be produced are indicated at 40.
  • the burners 14, 15 are simultaneously moved over the plate 16 in the direction of the arrow 11 and being displaced during such movement transversely with respect to the axis of symmetry 12 so that both burners 14 and 15 are displaced by the same distance 17-19 from the axis of symmetry 12.
  • the movement of the carrier 13 is directed toward the axis of symmetry 12, that is, the longitudinal axis 13a of the carrier 13 is at a rectangle with respect to the axis of symmetry 12.
  • the burner 14 at the beginning is clamped or secured to the front part 26a of the steel belt in such a manner that its center axis 24 is aligned with the line A.
  • the burner 15 is not coupled with the steel belt 26.
  • the cutting operation is started on a first contour line 20 which is at a rectangle with respect to the axis of symmetry 12, and during which the first burner 14 by means of control signals is moved from line A to line B to that on both sides 20a, 20b of the axis of symmetry 12, and a cutting 21 having the same length on each side is produced.
  • the length 22 of the cutting 21 corresponds to at least the distance 23 between the center axes 24, 25 of both burners 14, 15 when such burners are displaced adjacent to each other on the carrier 13.
  • the burner 14 becomes stopped, by for example, control pulses from the arrangement 10, and then manually, preferably however under the control of control pulses from the control arrangement 10, the burner 15 is moved toward burner 14 until both burners 14 and 15 will have a distance therebetween defined by the boss 30.
  • the center axis 25 of the burner 15 now falls on the line A and the center axis 24 of the burner 14 falls on the line B.
  • the burner 15 is coupled with the back belt portion 26b by being clamped thereto.
  • a work piece has been cut the length of which in the y direction is much longer than its width in the x direction. It is within the scope of the present invention to cut work pieces which are symmetrical, but shaped differently, for example, a work piece as shown in FIG. 2. It is also within the scope of the present invention to cut at the same time several similarly shaped symmetrical work pieces even with burners which are pair-wise attached to the steel band 26 and controlled by a single unit 10 and during which each burner pair like the one described and identified as 14 and 15, simultaneously will operate on the cutting of a single work piece of the plurality of work pieces cut.
  • the invention is not limited to the cutting of metallic work pieces since in its broad concept it is applicable to the cutting of work pieces other than metallic.
  • the invention is especially applicable to dual-axis automatic cutting machines for soft materials, such as textiles, and also for the drawing of symmetrical structural elements using numerically controlled drawing machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Arc Welding In General (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Control Of Cutting Processes (AREA)
US05/502,763 1973-09-18 1974-09-03 Method for cutting out a work piece by a plasma jet or similar cutting arrangement Expired - Lifetime US3950189A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2346847A DE2346847C2 (de) 1973-09-18 1973-09-18 Verfahren zum Ausschneiden, Insbesondere Brenn- oder Plasmaschneiden, eines Werkstückes
DT2346847 1973-09-18

Publications (1)

Publication Number Publication Date
US3950189A true US3950189A (en) 1976-04-13

Family

ID=5892884

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/502,763 Expired - Lifetime US3950189A (en) 1973-09-18 1974-09-03 Method for cutting out a work piece by a plasma jet or similar cutting arrangement

Country Status (4)

Country Link
US (1) US3950189A (enrdf_load_stackoverflow)
JP (1) JPS5056679A (enrdf_load_stackoverflow)
DE (1) DE2346847C2 (enrdf_load_stackoverflow)
GB (1) GB1475897A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30645E (en) * 1976-01-13 1981-06-16 Potomac Applied Mechanics, Inc. Method and apparatus for cutting sheet metal wrappers or the like
US4393296A (en) * 1977-11-16 1983-07-12 Metallurgie Hoboken-Overpelt Apparatus for the continuous manufacture of metallic anodes from molten metal
US4494297A (en) * 1981-10-06 1985-01-22 Asea Aktiebolag Method of producing castings with means to facilitate burr removal
US4903559A (en) * 1987-09-22 1990-02-27 First Brands Corporation Repetitive arc cutting of continuous sheeting
US5365816A (en) * 1993-06-22 1994-11-22 Design Systems, Inc. Beam cutter
US5635086A (en) 1995-10-10 1997-06-03 The Esab Group, Inc. Laser-plasma arc metal cutting apparatus
EP0795382A3 (en) * 1996-03-13 1998-04-08 Mitsubishi Heavy Industries, Ltd. Order change apparatus and cutting apparatus for a corrugating machine
US6222155B1 (en) 2000-06-14 2001-04-24 The Esab Group, Inc. Cutting apparatus with thermal and nonthermal cutters, and associated methods
EP1447068A1 (en) * 2003-02-14 2004-08-18 Fameccanica.Data S.p.A. Process and device for the localised treatment of articles, for example hygienic and sanitary products

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115119A (ja) * 1982-12-20 1984-07-03 Mitsubishi Heavy Ind Ltd トリミング装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026754A (en) * 1933-02-08 1936-01-07 Celanese Corp Manipulation of sheet material
US3272042A (en) * 1964-12-23 1966-09-13 Koppers Co Inc Slitting and scoring apparatus
US3276303A (en) * 1965-01-18 1966-10-04 Industrial Nucleonics Corp Portable sample cutter
US3486957A (en) * 1966-05-12 1969-12-30 Francis Edwin Fish Method and apparatus for cutting and edge-sealing thermoplastic woven fabrics
US3866892A (en) * 1973-06-11 1975-02-18 C R O Engineering Co Inc Dual torch cutting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026754A (en) * 1933-02-08 1936-01-07 Celanese Corp Manipulation of sheet material
US3272042A (en) * 1964-12-23 1966-09-13 Koppers Co Inc Slitting and scoring apparatus
US3276303A (en) * 1965-01-18 1966-10-04 Industrial Nucleonics Corp Portable sample cutter
US3486957A (en) * 1966-05-12 1969-12-30 Francis Edwin Fish Method and apparatus for cutting and edge-sealing thermoplastic woven fabrics
US3866892A (en) * 1973-06-11 1975-02-18 C R O Engineering Co Inc Dual torch cutting apparatus

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30645E (en) * 1976-01-13 1981-06-16 Potomac Applied Mechanics, Inc. Method and apparatus for cutting sheet metal wrappers or the like
US4393296A (en) * 1977-11-16 1983-07-12 Metallurgie Hoboken-Overpelt Apparatus for the continuous manufacture of metallic anodes from molten metal
US4946575A (en) * 1977-11-16 1990-08-07 Metallurgie Hoboken-Overpelt Metallic anodes manufactured from molten copper
US4494297A (en) * 1981-10-06 1985-01-22 Asea Aktiebolag Method of producing castings with means to facilitate burr removal
US4903559A (en) * 1987-09-22 1990-02-27 First Brands Corporation Repetitive arc cutting of continuous sheeting
US5365816A (en) * 1993-06-22 1994-11-22 Design Systems, Inc. Beam cutter
US5635086A (en) 1995-10-10 1997-06-03 The Esab Group, Inc. Laser-plasma arc metal cutting apparatus
EP0795382A3 (en) * 1996-03-13 1998-04-08 Mitsubishi Heavy Industries, Ltd. Order change apparatus and cutting apparatus for a corrugating machine
US6222155B1 (en) 2000-06-14 2001-04-24 The Esab Group, Inc. Cutting apparatus with thermal and nonthermal cutters, and associated methods
EP1447068A1 (en) * 2003-02-14 2004-08-18 Fameccanica.Data S.p.A. Process and device for the localised treatment of articles, for example hygienic and sanitary products

Also Published As

Publication number Publication date
DE2346847B1 (de) 1974-06-06
GB1475897A (en) 1977-06-10
JPS5056679A (enrdf_load_stackoverflow) 1975-05-17
DE2346847C2 (de) 1975-01-30

Similar Documents

Publication Publication Date Title
US3950189A (en) Method for cutting out a work piece by a plasma jet or similar cutting arrangement
US4739487A (en) Method and apparatus for a reciprocating lay system of profile pieces on a base for the purpose of plotting and/or cutting
US5614115A (en) Computer-controlled laser cutter with optical sensor
US4449699A (en) Method of controlling an operation of a copy-cutting apparatus
US6178859B1 (en) Apparatus for cutting sheet material
US4006656A (en) Scoring and cutting apparatus for an elongated sheet
US4466069A (en) Flame cutting machine with lost cut re-establishment
US4700758A (en) Device for trimming the edges of veneer
US3614369A (en) Method of and apparatus for cutting cloth
US4012027A (en) Metal cutting machine with scrap saving feature
GB1382541A (en) Material cutting system
US3866892A (en) Dual torch cutting apparatus
US3766813A (en) Methods for cutting sharp corners and notches in layups of fabric and other sheet material
JPH04261800A (ja) ワークピースを切断する方法及び該方法を実施するための装置
US3312562A (en) Method and apparatus for cutting and marking metal plate
CA2067775A1 (en) Automatic sewing machine system
US2202130A (en) Metal shaping process and apparatus
US20060186100A1 (en) Device and procedure for the working of a surface of a transparent or translucent workpiece
US5102473A (en) Process and device to transversely cut metal workpieces
US3114205A (en) Apparatus for simultaneous flame cutting and marking of profiled sheet metal
JPS56119687A (en) Method for working of cold rolling surface
KR20230094405A (ko) 길이 및 폭 동시 절단기 및 길이 및 폭 동시 가공 방법
US3764122A (en) Apparatus for selectively scarfing metal bodies
JPH09279474A (ja) 被切断材の位置修正方法
JP2649628B2 (ja) ウォータージェットによる脆性材料の加工装置